“There is some exciting preliminary data, based largely on animal models, that components in cannabis can be neuroprotective and may possibly hold keys to addressing the aging process in the brain and/or age-related disorders,” Paul Armentano, the deputy director of the National Organization for the Reform of Marijuana Laws (NORML), told Healthline.

“Obviously, these findings and their implications appear to be opposite of those suggested by Dr. Amen,” Armentano said.

Amen’s findings concerning the impact of marijuana use on brain aging may have been the most visible issue